Service Description: Connecticut Bedrock Geology is 1:50,000-scale data suitable for geologic and environmental mapping and analysis purposes. Not intended for maps printed at map scales greater or more detailed than 1:50,000 scale (1 inch = 4,167 feet.).
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Supported query Formats: JSON
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Description: Connecticut Bedrock Geology is a 1:50,000-scale, polygon, line, and point feature-based layer describing the solid material that underlies the soil or other unconsolidated material of the earth for Connecticut. Bedrock geologic formations are described as polygons in terms of formation name (incorporating geologic age), rock type, and tectonic terrane association. Tectonic forces are responsible for the present day geologic configuration of the continents. Resulting terranes are regionally fault bounded rocks of a similar tectonic history. Each terrane is named after its plate tectonics ancestry. Geologic lines include contacts, faults, and terrane boundaries. Terrane boundaries are named for the faults involved. The geologic contacts and faults are delineated and classified by type. Geologic points include bedding and foliation. They are classified by type. Polygon feature attribute information is comprised of codes to identify individual bedrock geologic units, their formation name, description and size. Line feature attributes identify, name and describe bedrock contacts, faults and terrane boundaries between these bedrock geologic units. Point feature attributes identify the orientation of bedding and foliation within bedrock geologic units. A complete description of the bedrock mapping units with mineralogical descriptions and a brief history of Connecticut geology are included in the Supplemental Information Section for reference. The data source is from John Rodgers, Bedrock Geological Map of Connecticut, 1985 (Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2 sheets, 1:125,000 publication scale). This datalayer was compiled by the Connecticut Geological Survey, DEP from the Rodgers (1:24,000 scale) compilation sheets and published statewide compilation (1:125,000 scale), Rodgers (1985). OrientationPoints produced under a Connecticut Source Water Assessment Program (SWAP) study of geological factors by the U.S. Geological Survey and CT Department of Environmental Protection, State Geological and Natural History Survey in 2002-2003. The CT SWAP program was an outgrowth of the U.S. EPA administered National Safe Drinking Water Act [SDWA] Amendments of 1996. Additional historical information is in the map notes section. For a stratigraphic correlation of bedrock units, major regional and statewide tectonic structures, and cross sectional views of the State's geology, please refer to the 1:125,000 scale Bedrock Geological Map of Connecticut. The Bedrock Geological Map of Connecticut is available for purchase at the DEP Store ctdeepstore.com. PDF map document available online cteco.uconn.edu/maps/state/Bedrock_Geologic_Map_of_Connecitucut.pdf.
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